Care With the Use of Astrofog
Astrofog is a "carrier" marketed by Bob Anderson in New Plymouth (NZ). The main benefit of using Astrofog over other carriers was claimed to be the much smaller particle size that can be achieved by using “neat” Astrofog (i.e. in combination with the chemical to be applied but without added water). The smaller particle size results in better coverage with a thinner film. It was also claimed that with the smaller particle size the electrical attraction between the plant material and the particles is increased thereby giving even coverage on both the upper and lower surfaces of the leaves, stems and blooms.
A number of cymbidium growers in Northland have used Astrofog. The general impression is that control effect of the chemicals is much superior to other fogging methods particularly for the control of two-spotted mites. Some localised damage has however been observed to leaves and stems especially those in close proximity to where the fogger was placed. This damage has been attributed to the greater concentration of chemicals in the vicinity of the fogging tube due to the mixture not fogging completely or particles coagulating to form large droplets. Fogger tuning and proximity to plants may correct this.
While the improved effectiveness is of major importance it is also very clear that special care needs to be taken with the use of Astrofog to minimize crop loss through chemical burning.
Bob Anderson can be contacted on 06-757-9853 or 027-313123 or by email pestfree1@xtra.co.nz
